68019739 has 2 divisors, whose sum is σ = 68019740. Its totient is φ = 68019738.

The previous prime is 68019733. The next prime is 68019767. The reversal of 68019739 is 93791086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68019739 - 2¹³ = 68011547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68019695 and 68019704.

It is not a weakly prime, because it can be changed into another prime (68019733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34009869 + 34009870.

It is an arithmetic number, because the mean of its divisors is an integer number (34009870).

Almost surely, 2^68019739 is an apocalyptic number.

68019739 is a deficient number, since it is larger than the sum of its proper divisors (1).

68019739 is an equidigital number, since it uses as much as digits as its factorization.

68019739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 68019739 is about 8247.4080170682. The cubic root of 68019739 is about 408.2050003857.

The spelling of 68019739 in words is "sixty-eight million, nineteen thousand, seven hundred thirty-nine".